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Lepro Total Comments JS

lepro total comments JS

当前为 2016-09-13 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         Lepro Total Comments JS
  3. // @description  lepro total comments JS
  4. // @license      MIT
  5. // @namespace    leprosorium.ru
  6. // @include      http://leprosorium.ru/comments/*
  7. // @include      http://*.leprosorium.ru/comments/*
  8. // @include      http*://leprosorium.ru/comments/*
  9. // @include      http*://*.leprosorium.ru/comments/*
  10. // @copyright    2016, lynxtaa
  11. // @grant        none
  12. // @version      1.5
  13. // ==/UserScript==
  14.  
  15. var BEST_TRESHOLD = 0.75,
  16. 	std_dev;
  17.  
  18. var all = document.createElement('a'),
  19. 	best = document.createElement('a'),
  20. 	controls = document.getElementById('js-comments').querySelector('.b-comments_controls'),
  21. 	holder = document.getElementById('js-comments_holder'),
  22. 	style = document.createElement('style');
  23.  
  24. style.textContent = ".is_hidden { display: none; }";
  25. document.body.appendChild(style);
  26.  
  27. controls.querySelector('a[data-key="sort"]').className = '';
  28.  
  29. // Кнопки управления
  30. best.textContent = 'лучшие';
  31. all.textContent = 'все';
  32. controls.appendChild(best);
  33. controls.appendChild(all);
  34.  
  35. // Лучшее
  36. best.addEventListener('click', function(e) {
  37. 	e.preventDefault();
  38.  
  39. 	if (this.className === 'active') {
  40. 		return false;
  41. 	}
  42.  
  43. 	this.className = 'active';
  44. 	this.nextSibling.className = '';
  45.  
  46. 	if (std_dev) {
  47. 		document.body.appendChild(style);
  48. 	} else {
  49. 		parseComments();
  50. 	}
  51. }, false);
  52.  
  53. // Показать всё
  54. all.addEventListener('click', function(e) {
  55. 	e.preventDefault();
  56.  
  57. 	if (std_dev && this.className !== 'active') {
  58. 		this.className = 'active';
  59. 		this.previousSibling.className = '';
  60. 		document.body.removeChild(style);
  61. 	}
  62. }, false);
  63.  
  64.  
  65. function parseComments() {
  66. 	var votes = [].slice.call(holder.querySelectorAll('strong.vote_result'));
  67. 	var	abovenull = 0,
  68. 		rating_square_sum = 0,
  69. 		rating_sum = 0,
  70. 		shown = votes.length;
  71.  
  72. 	var ratings = votes.map(function(el) {
  73. 		var rating = +el.textContent;
  74.  
  75. 		if (rating > 0) {
  76. 			abovenull++;
  77. 			rating_sum += rating;
  78. 			rating_square_sum += Math.pow(rating, 2);
  79. 		}
  80.  
  81. 		return { el, rating };
  82. 	});
  83.  
  84. 	abovenull = abovenull || 1;
  85.  
  86. 	std_dev = Math.sqrt((rating_square_sum / abovenull) -
  87. 				Math.pow(rating_sum / abovenull, 2)) || 0.1;
  88.  
  89. 	for (var i = ratings.length; i--; ) {
  90. 		if (ratings[i].rating / std_dev < BEST_TRESHOLD) {
  91. 			var comment = ratings[i].el.parentNode.parentNode.parentNode.parentNode;
  92. 			if (!comment.classList.contains('comment')) throw new Error("Can't find comment.");
  93. 			comment.classList.add('is_hidden');
  94. 			shown--;
  95. 		}
  96. 	}
  97.  
  98. 	best.setAttribute('title', shown);
  99. }